<?php  
function unicodeDecode($unicode_str){
    $json = '{"str":"'.$unicode_str.'"}';
    $arr = json_decode($json,true);
    if(empty($arr)) return '';
    return $arr['str'];
}
 $fmc_l = __DIR__.'/../config.php';  
 require $fmc_l;
$conn = new mysqli($db_host, $db_user, $db_pass, $db_name);    
if ($conn->connect_error) {    
    die("连接失败: " . $conn->connect_error);    
}  
$currentVersion = phpversion();  
if (version_compare($currentVersion, '7.2.0') >= 0) { 
 }else{
	 echo 'php版本必须是7.2及以上';
	 exit;
 }

?>